Industrial Engineering and Production Management
Travel charts provide

A compact estimate of the handling which must be done between various work sections
An approximate estimate of the handling which must be done at a particular station
An idea of the flow of materials at various stages
The information for changes required in rearranging material handling equipment

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Industrial Engineering and Production Management
The reasons which are basically responsible for the formation of a queue should be that

Output rate is linearly proportional to input
The average service rate Hess than the average arrival rate
Output rate is constant and the input varies in a random manner
All of these

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